Paper-stock refiner



No. 6|4,3l6. Patented Nov. l5, I898. J. H. BAKER, G. F. SHEVLIN 6. F. H.BAKER. PAPER STOCK REFINEB.

(Application filed June 7, 1897.)

(No Model.)

NITED STATES PATENT Enron,

JAMES H. BAKER, GEORGE F. SHEVLIN, AND FREDERICK H. BAKER, OF SARATOGASPRINGS, NEW YORK.

APAPER-STOCK REFINER.

SPECIFICATION forming part of Letters Patent No. 614,816, dated November15, 1898. Application filed June 7,1897. Serial No. 639,653- (No model.)

To aZZ whom it may concern.-

Be it known that We, JAMES H. BAKER, GEORGE F. SHEVLIN, and FREDERICK H.

BAKER, citizens of the United States, residing at Saratoga Springs, inthe county of Saratoga and State of New York, have invented anImprovement in Paper-Stock Refiners, of which the following is aspecification.

Paper-stock is sometimes reground or refined by the action of revolvingstones. The present improvement relates to the peculiar constructionof'apparatus whereby the stones are more securely held inrposition andadjusted with great accuracy and facility, and as the stones are wornaway they can be set up in order to maintain uniformity in the grindingorv refining action.

In the drawings, Figure 1 is a plan view. Fig. 2 is a vertical sectionlongitudinally, and Fig. 3 is an end view with the stationary stone andits supporting-case removed.

The casings A and A are faced to form water-tight joints at 1, and theyare connected together by bolts at 2, and the caseais of a size adaptedto receive within it the grinding-stones, the stationary stone B beingheld within the removable head or part A of the case, and the revolvingor runner stone B is within a holder 0, that is free to be revolvedwithin the part A of the casing, and the stone B is retained within theholder by sulfur or similar material, and so also is the stone B heldwithin the part A of the casing, and it is advantageous to groove thesurfaces of these stones and provide ribs 5 and 6 upon the innersurfaces of the casing A and holder 0, so that the respective stones areattached very firmly in their positions.

The main shaft D is made with a conical portion 3, having a key upon itentering a slot in the hub of the holder 0, and a nut 7, screwed uponthe threaded portion of the shaft D, serves to press the conical hubfirmly upon the conical portion of the shaft D, so as to hold the partsreliably together and to tighten the same should they become loose, andthis shaft D passes through a central hole in the casingA and issupported by a bearing 8- usually being made in one casting, and thereis a base F, supporting the frame and the parts therewith connected, andan opening 17 in the lower part of thecasing A communicates laterallyinto a trough 13 for the discharge of the paper-stock, from which trougha pipe passes in any suitable direction, and the inlet-pipe 12 for thepaper-stock is upon the casing A and opens centrally through thebed-stone B.

Upon the shaft D is a centrifugal pump or propeller E, having curvedblades and occu pying a recess formed by concaves in the centralportions of the stones B B, and this propeller or pump surrounds the nut7, and there is a feather upon the surface of the tubular nut 7,receiving the propeller, and a screw 11, by which the parts are clampedin position. This allows the propeller to. be set in the proper positionin relation to the grinding-stones.

There is a stand or frame G, having a hearing through which the mainshaft D passes, and the tie-rod 14: connects the upper end of thisbearing-frame to the casing A, and the driving-pulleyHis between thestand or frame G and the bearing 8, and the shaft is of uniform diameterwhere it passes through the bearings and the pulley-hub, so that an endmovement may be given to the shaft, as required from time to time inbringing the surfaces of the stones into the desired proximity one tothe other, and in order to insure the proper rotation of the shaft D bythe drivingpulley a key 16 is provided on the shaft D and a long grooveextends through the hub of the driving-pulley. The tie-rod 14 isscrew-threaded at its ends and passes through the stand G and isprovided with nuts, so as to be adjustable and support the two-part caseand insure the surface of the stationary stone being parallel to thesurface of the running-stone when the respective parts are set up inplace.

At the ends of the shaft D are steps or pivots at b, and these areadjacent to the hard metal bearings c 01 within the slide-collars e i,which slide-collars rest at their ends upon the level top edges of therespective troughs M and N, which troughs are adapted to receive andhold any oil or lubricating material that may drop, as such lubricatingmaterial is applied between the pivots a b and the hardmetal bearings cd, and holes with screws Z are provided in the bottoms of the respectivetroughs to allow for drawing olf any oil or other lubricating material.

The adjusting-screws K L are in line with the ends of the main shaft D,and there are hand-wheels for moving the respective screws and alock-whee120 upon the screw L for preventing the same turning after theparts may have been adjusted, and there is a slide-nut n, through whichthe screw K passes, and a spring 0 intervenes between the slide-nut nand the slide-collar 6, so that this spring tends to press the shaftendwise toward the screw L and to bring the faces of the stones closelytogether, and the screw L limits the motion and regulates the proximityof the surfaces, and by actuating the screw K the spring 0 may be putunder more or less compression and its action regulated, because thesame sometimes has to yield for the passage of any obstruction betweenthe stones. A stuffingbox is applied around the shaft D, near theinlet-pipe 12, for preventing the paper-stock leaking out around theshaft at this place.

In operation the paperstock is run in through the pipe 12, and thecentrifugal pump or propeller E causes the agitation of the water andpaper-stock, and it also produces a pressure for driving the stockthrough between the moving stone and the stationary stone, and thusrefining or reducing the paper-stocl so that it may be properlydelivered along with the water, and as the stones may wear down from usethe fineness of the pulp may be constantly regulated by theadjusting-screws K and L.

The ends of the slide-collars e i and of the slide-nut n areadvantageously made to grip overthe upper edges of the respectivetroughs M and N, so that they may slide with sufficient freedom and yetbe kept properly in line with the axis of the centrifugal paperstockrefiner.

In the operation of this machine it is found that the surfaces ofthestones wear away to such an extent that the drivingpulley if it wasattached;permanently to the shaft would not be in line with thedriving-belt and adjustments would frequently be required. By confiningthe drivin g-pulley between the parts of the frame and allowing theshaft to slide freely through it the stone yields to obstructions, andcan also be set up by the screw to compensate wear, and thedriving-pulley remains in its proper position.

XVe claim as our invention- 1. In a paper-stock refiner, the combinationwith the non-revoluble stone and the runnerstone and a revoluble andendwise-movable shaft to which the runner-stone is connected, and twosupports for the shaft, of screws acting at the ends of the shaft toregulate the position of the runner-stone to the non-revoluble stone, aspring to allow one stone to separate from the other, a feather anddrivingpulley upon the shaft, the pulleyhavingahub occupying the spacebetween the two supports for the shaft, to maintain the drivingpulley ina definite position as the shaft moves endwise through the hub of thepulley, substantially as set forth.

2. In a paper-stock refiner, the combination with the non-revolublestone and the runnerstone and a revoluble and endwise-movable shaft towhich the runner-stone is connected, a frame and two supports for theshaft, of screws acting at the ends of the shaft to regulate theposition of the runner-stone to the non-revoluble stone, a spring toallow one stone to separate from the other, a feather and driving-pulleyupon the shaft, the pulley having a hub occupying the space between thetwo supports for the shaft to maintain the driving-pulley in a definiteposition as the shaft moves endwise through the hub of the pulley, andan adjustable rod between the two portions of the frame, substantiallyas set forth.

3. In a paper-stock grinder or refiner, the combination with thestationary stone, of a shaft, a holder fitting a tapering portion of theshaft, and a stone secured in such holder, a cylindrical nut screwedupon the shaft and securing the holder upon the tapering portion of suchshaft, and a propeller having a hub surrounding the cylindrical nut andsecured thereto, substantially as specified. I

Signed by us this 15th day of May, 1807.

, JAMES H. BAKER.

GEO. F. SHEVLIN. FREDK. II. BAKER. Witnesses:

J. W. CRANE, JOHN S. BARBOUR.

